Enhanced light out-coupling efficiency of organic light-emitting diodes with an extremely low haze by plasma treated nanoscale corrugation

Ju Hyun Hwang, Hyun Jun Lee, Yong Sub Shim, Cheol Hwee Park, Sun Gyu Jung, Kyu Nyun Kim, Young Wook Park, Byeong Kwon Ju

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Extremely low-haze light extraction from organic light-emitting diodes (OLEDs) was achieved by utilizing nanoscale corrugation, which was simply fabricated with plasma treatment and sonication. The haze of the nanoscale corrugation for light extraction (NCLE) corresponds to 0.21% for visible wavelengths, which is comparable to that of bare glass. The OLEDs with NCLE showed enhancements of 34.19% in current efficiency and 35.75% in power efficiency. Furthermore, the OLEDs with NCLE exhibited angle-stable electroluminescence (EL) spectra for different viewing angles, with no change in the full width at half maximum (FWHM) and peak wavelength. The flexibility of the polymer used for the NCLE and plasma treatment process indicates that the NCLE can be applied to large and flexible OLED displays.

Original languageEnglish
Pages (from-to)2723-2728
Number of pages6
JournalNanoscale
Volume7
Issue number6
DOIs
Publication statusPublished - 2015 Jan 1

ASJC Scopus subject areas

  • Materials Science(all)

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